Re: [LegacyUG] Lifespan, and other, statistics

[Jens Johan Kaasbøll]

I tried to figure out why the average age dropped so much from 1800 to 1900.
I created a test file with a male with lifespan 1960-1990 and a female 
1960-2010. Their
average life should be 40 years.
Legacy 8 calculated the average to 39 years, 11m, 20d. OK.

Then I added a female born 1990, still living. The stat report now lowers the 
average age
for people 1900-1999 to 26 years,7m,24d. !

The only way this result can come about is that Legacy has assumed that the 
living
individual died as an infant.

So Legacy, fix up the calculation of average age.

The average age for males = 30 and females 50, which are reasonable.

Best regards,
Jens K.


On 16.12.2013 23:40, Jay 1FamilyTree wrote:
> Eliz,
>
> What we are all wondering is what records are selected to be used for the 
> averaging?
>
> For the 1900-1999 grouping does that mean a person had to be born aft 1900 or 
> died after
> 1900?
>
> How much does abt., aft., bet, bef, cal, cir, records are used if any?
>
> A simple explanation on the Help page would suffice for most of us, but I am 
> dismayed it
> wasnt part of the update release.
>
>
> Jay
>
>
>
>
>
>
>
> On Mon, Dec 16, 2013 at 8:51 AM, Eliz Hanebury  > wrote:
>
>
> I wondered if you have a lot of people with no known birth date but who 
> do have a date
> of death. Legacy thinks that = 0 which will lower your age stats a lot.
>
> Eliz
> Not Today and Not without a Fight
> (Anon)
>
> For all that has been, thanks.
> For all that will be, yes.
>  (Dag Hammarskjold)
>
>
> On Mon, Dec 16, 2013 at 7:04 AM, David Newton 
>  > wrote:
>
> Could one of you explain to me how the statistics are calculated?
>
> In my family file the average lifespan by century never exceeds 17 
> years
> whereas the average male and female lifespans are around 53 and 48
> respectively. These figures seem to be inconsistent with each other 
> but
> in the absence of how the calculations are done I cannot be sure what 
> it
> is telling me.
>
> David
>
>
>
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Re: [LegacyUG] Lifespan, and other, statistics

[Jay 1FamilyTree]

Eliz,

What we are all wondering is what records are selected to be used for the
averaging?

For the 1900-1999 grouping does that mean a person had to be born aft 1900
or died after 1900?

How much does abt., aft., bet, bef, cal, cir, records are used if any?

A simple explanation on the Help page would suffice for most of us, but I
am dismayed it wasnt part of the update release.


Jay








On Mon, Dec 16, 2013 at 8:51 AM, Eliz Hanebury  wrote:

>
> I wondered if you have a lot of people with no known birth date but who do
> have a date of death. Legacy thinks that = 0 which will lower your age
> stats a lot.
>
> Eliz
> Not Today and Not without a Fight
> (Anon)
>
> For all that has been, thanks.
> For all that will be, yes.
> (Dag Hammarskjold)
>
>
> On Mon, Dec 16, 2013 at 7:04 AM, David Newton <
> davidnew...@drdavid.plus.com> wrote:
>
>> Could one of you explain to me how the statistics are calculated?
>>
>> In my family file the average lifespan by century never exceeds 17 years
>> whereas the average male and female lifespans are around 53 and 48
>> respectively. These figures seem to be inconsistent with each other but
>> in the absence of how the calculations are done I cannot be sure what it
>> is telling me.
>>
>> David
>>
>>
>>
>> Legacy User Group guidelines:
>> http://www.LegacyFamilyTree.com/Etiquette.asp
>> Archived messages after Nov. 21 2009:
>> http://www.mail-archive.com/legacyusergroup@legacyusers.com/
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>> on our blog (http://news.LegacyFamilyTree.com).
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>>
>>
>>
>
>
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Re: [LegacyUG] Lifespan, and other, statistics

[hwedhlor]

David,

I note that there has not been a single response to your
question from the Legacy staff.  I would have thought it a
simple thing for them to have supplied the answer to your
question, yet they have not done so.  Additionally I believe
there should be an appendix to the Legacy manual that
provides both the logic, and the formulas used for all
calculated numeric data.  Just like unsourced entries in our
databases, unexplained statistics are useless!

So, Legacy staff, what are the answers your customers are
asking for?

John Zimmerman
Mesa, AZ

On 16-Dec-13 5:04 AM, David Newton wrote:
> Could one of you explain to me how the statistics are calculated?
>
> In my family file the average lifespan by century never exceeds 17 years
> whereas the average male and female lifespans are around 53 and 48
> respectively. These figures seem to be inconsistent with each other but
> in the absence of how the calculations are done I cannot be sure what it
> is telling me.
>
> David
>
>
>
> Legacy User Group guidelines:
> http://www.LegacyFamilyTree.com/Etiquette.asp
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> our blog (http://news.LegacyFamilyTree.com).
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>
>
>




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Re: [LegacyUG] Lifespan, and other, statistics

[David Newton]

I think I have a possible explanation. I have been working with a recent
family file where I still have lots of missing data. On a quick estimate
only about 20% of my individuals have both birth and death data and the
numbers for century-lifespans are about 20% of the gender-lifespans
which suggests that the factor used to calculate the average might be
the total number born in the century rather than the total number who
have a calculated lifespan.

So I opened a file that I haven't worked on for a while where I have
about 50% with both birth and death data and found that the
century-lifespans are now about 50% of the gender lifespans.

On this rather thin basis of two files I think that the century-lifespan
statistics have been averaged over the wrong population.

David


On 16/12/2013 19:32, David Newton wrote:
> Some good points here. As it happens I have no individuals of
> indeterminate sex but I do have a significant number with missing birth
> or death dates which makes the population available for the lifespan
> statistics small. However, I still cannot see any reason why there
> should be such a big discrepancy in gender related lifespans and century
> related lifespans.
>
> David
>
> On 16/12/2013 18:41, Kurt Kneeland wrote:
>> Can't tell you specifically, but it sounds like you have a relatively
>> high proportion of infant deaths with no sex specified.  So you get a
>> bunch of zeros included in the overall average that are not included
>> in the male/female averages.
>>
>> I don't think an individual is included in the averages at all if
>> either the birth date or the death date is missing.  However, a
>> christening date might be used in place of a missing birth date, and a
>> burial date might be used in place of a missing death date.
>>
>> -Original Message-
>> From: David Newton [mailto:davidnew...@drdavid.plus.com]
>> Sent: Monday, December 16, 2013 6:05 AM
>> To: LegacyUserGroup@LegacyUsers.com
>> Subject: [LegacyUG] Lifespan, and other, statistics
>>
>> Could one of you explain to me how the statistics are calculated?
>>
>> In my family file the average lifespan by century never exceeds 17
>> years whereas the average male and female lifespans are around 53 and
>> 48 respectively. These figures seem to be inconsistent with each other
>> but in the absence of how the calculations are done I cannot be sure
>> what it is telling me.
>>
>> David
>>
>>
>>
>> Legacy User Group guidelines:
>> http://www.LegacyFamilyTree.com/Etiquette.asp
>> Archived messages after Nov. 21 2009:
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>> and on our blog (http://news.LegacyFamilyTree.com).
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>>
>>
>>
>>
>>
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>>
>>
>>



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Re: [LegacyUG] Lifespan, and other, statistics

[David Newton]

Some good points here. As it happens I have no individuals of
indeterminate sex but I do have a significant number with missing birth
or death dates which makes the population available for the lifespan
statistics small. However, I still cannot see any reason why there
should be such a big discrepancy in gender related lifespans and century
related lifespans.

David

On 16/12/2013 18:41, Kurt Kneeland wrote:
> Can't tell you specifically, but it sounds like you have a relatively high 
> proportion of infant deaths with no sex specified.  So you get a bunch of 
> zeros included in the overall average that are not included in the 
> male/female averages.
>
> I don't think an individual is included in the averages at all if either the 
> birth date or the death date is missing.  However, a christening date might 
> be used in place of a missing birth date, and a burial date might be used in 
> place of a missing death date.
>
> -Original Message-
> From: David Newton [mailto:davidnew...@drdavid.plus.com]
> Sent: Monday, December 16, 2013 6:05 AM
> To: LegacyUserGroup@LegacyUsers.com
> Subject: [LegacyUG] Lifespan, and other, statistics
>
> Could one of you explain to me how the statistics are calculated?
>
> In my family file the average lifespan by century never exceeds 17 years 
> whereas the average male and female lifespans are around 53 and 48 
> respectively. These figures seem to be inconsistent with each other but in 
> the absence of how the calculations are done I cannot be sure what it is 
> telling me.
>
> David
>
>
>
> Legacy User Group guidelines:
> http://www.LegacyFamilyTree.com/Etiquette.asp
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>
>
>
>
>
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>
>



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RE: [LegacyUG] Lifespan, and other, statistics

[Kurt Kneeland]

Can't tell you specifically, but it sounds like you have a relatively high 
proportion of infant deaths with no sex specified.  So you get a bunch of zeros 
included in the overall average that are not included in the male/female 
averages.

I don't think an individual is included in the averages at all if either the 
birth date or the death date is missing.  However, a christening date might be 
used in place of a missing birth date, and a burial date might be used in place 
of a missing death date.

-Original Message-
From: David Newton [mailto:davidnew...@drdavid.plus.com]
Sent: Monday, December 16, 2013 6:05 AM
To: LegacyUserGroup@LegacyUsers.com
Subject: [LegacyUG] Lifespan, and other, statistics

Could one of you explain to me how the statistics are calculated?

In my family file the average lifespan by century never exceeds 17 years 
whereas the average male and female lifespans are around 53 and 48 
respectively. These figures seem to be inconsistent with each other but in the 
absence of how the calculations are done I cannot be sure what it is telling me.

David



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Re: [LegacyUG] Lifespan, and other, statistics

[John Roose]

David -

Thank you for opening my eyes to the box on the right - "Edit Individual"
:-)

You are correct that they do appear to be based upon birth year. I have
another (different line) that lived 3 months and 1 day longer than Aunt
Annie; he was born 1855 and died in 1961; thus she was not the "oldest born
between 1800 and 1899."


Genealogy - - - - - it's in my blood!


On Mon, Dec 16, 2013 at 12:34 PM, David Newton  wrote:

> It is possible to check who the individual in question is by selecting
> Edit individual. I started checking back and found that your suggestion
> could be correct until I checked my longest living between 1700 and 1799
> and came up with an individual born in 1787 and dying in 1878. On this
> basis your Aunt Annie perhaps could be longest living 1800-1899.
>
> On 16/12/2013 17:10, John Roose wrote:
> > The "Longest Living Individual" had me puzzled. I regularly saw my Aunt
> > Annie until she died at 105 - always had to read the current issue of
> Time
> > magazine because she would quiz you on it, especially if you disagreed
> with
> > her view! :-) She died in 1979. The statistic "Individual who lived the
> > longest between 1900 and 1999" was given as 100 years, 2 months, 27 days
> -
> > not Aunt Annie. Finally realized that that statistic must mean EXACTLY
> what
> > is says - between 1990-1999; Aunt Annie would not qualify because she was
> > born in 1873.
> >
> > It would be interesting to know  - as David requested - how the
> statistics
> > are calculated.
> >
> >
> > Genealogy - - - - - it's in my blood!
> >
> >
> > On Mon, Dec 16, 2013 at 11:42 AM, singhals  wrote:
> >
> >> David Newton wrote:
> >>> Could one of you explain to me how the statistics are calculated?
> >>>
> >>> In my family file the average lifespan by century never exceeds 17
> years
> >>> whereas the average male and female lifespans are around 53 and 48
> >>> respectively. These figures seem to be inconsistent with each other but
> >>> in the absence of how the calculations are done I cannot be sure what
> it
> >>> is telling me.
> >>
> >> I assume they're simple averages: add together all the
> >> individual lifespans and divide by the number of entries.
> >> These stats can shed some serious light or doubt on some
> >> "facts." (g)
> >>
> >>
> >>
> >>
> >> Legacy User Group guidelines:
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> >>
> >>
> >>
> >
> >
> >
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>
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Re: [LegacyUG] Lifespan, and other, statistics

[David Newton]

It is possible to check who the individual in question is by selecting
Edit individual. I started checking back and found that your suggestion
could be correct until I checked my longest living between 1700 and 1799
and came up with an individual born in 1787 and dying in 1878. On this
basis your Aunt Annie perhaps could be longest living 1800-1899.

On 16/12/2013 17:10, John Roose wrote:
> The "Longest Living Individual" had me puzzled. I regularly saw my Aunt
> Annie until she died at 105 - always had to read the current issue of Time
> magazine because she would quiz you on it, especially if you disagreed with
> her view! :-) She died in 1979. The statistic "Individual who lived the
> longest between 1900 and 1999" was given as 100 years, 2 months, 27 days -
> not Aunt Annie. Finally realized that that statistic must mean EXACTLY what
> is says - between 1990-1999; Aunt Annie would not qualify because she was
> born in 1873.
>
> It would be interesting to know  - as David requested - how the statistics
> are calculated.
>
>
> Genealogy - - - - - it's in my blood!
>
>
> On Mon, Dec 16, 2013 at 11:42 AM, singhals  wrote:
>
>> David Newton wrote:
>>> Could one of you explain to me how the statistics are calculated?
>>>
>>> In my family file the average lifespan by century never exceeds 17 years
>>> whereas the average male and female lifespans are around 53 and 48
>>> respectively. These figures seem to be inconsistent with each other but
>>> in the absence of how the calculations are done I cannot be sure what it
>>> is telling me.
>>
>> I assume they're simple averages: add together all the
>> individual lifespans and divide by the number of entries.
>> These stats can shed some serious light or doubt on some
>> "facts." (g)
>>
>>
>>
>>
>> Legacy User Group guidelines:
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Re: [LegacyUG] Lifespan, and other, statistics

[John Roose]

The "Longest Living Individual" had me puzzled. I regularly saw my Aunt
Annie until she died at 105 - always had to read the current issue of Time
magazine because she would quiz you on it, especially if you disagreed with
her view! :-) She died in 1979. The statistic "Individual who lived the
longest between 1900 and 1999" was given as 100 years, 2 months, 27 days -
not Aunt Annie. Finally realized that that statistic must mean EXACTLY what
is says - between 1990-1999; Aunt Annie would not qualify because she was
born in 1873.

It would be interesting to know  - as David requested - how the statistics
are calculated.


Genealogy - - - - - it's in my blood!


On Mon, Dec 16, 2013 at 11:42 AM, singhals  wrote:

> David Newton wrote:
> > Could one of you explain to me how the statistics are calculated?
> >
> > In my family file the average lifespan by century never exceeds 17 years
> > whereas the average male and female lifespans are around 53 and 48
> > respectively. These figures seem to be inconsistent with each other but
> > in the absence of how the calculations are done I cannot be sure what it
> > is telling me.
>
> I assume they're simple averages: add together all the
> individual lifespans and divide by the number of entries.
> These stats can shed some serious light or doubt on some
> "facts." (g)
>
>
>
>
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Re: [LegacyUG] Lifespan, and other, statistics

[David Newton]

That may well be true. I have a tendency with pre-1837 records to only
put in a christening date and not estimate a birth date. However, having
said that I would expect that to affect both the by-century averages and
the by-gender averages and it is the major discrepancy between these
numbers that concerns me.

David

On 16/12/2013 16:51, Eliz Hanebury wrote:
> I wondered if you have a lot of people with no known birth date but who do
> have a date of death. Legacy thinks that = 0 which will lower your age
> stats a lot.
>
> Eliz
> Not Today and Not without a Fight
> (Anon)
>
> For all that has been, thanks.
> For all that will be, yes.
>  (Dag Hammarskjold)
>
>
> On Mon, Dec 16, 2013 at 7:04 AM, David Newton
> wrote:
>
>> Could one of you explain to me how the statistics are calculated?
>>
>> In my family file the average lifespan by century never exceeds 17 years
>> whereas the average male and female lifespans are around 53 and 48
>> respectively. These figures seem to be inconsistent with each other but
>> in the absence of how the calculations are done I cannot be sure what it
>> is telling me.
>>
>> David
>>
>>
>>
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>>
>>
>
>
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Re: [LegacyUG] Lifespan, and other, statistics

[Eliz Hanebury]

I wondered if you have a lot of people with no known birth date but who do
have a date of death. Legacy thinks that = 0 which will lower your age
stats a lot.

Eliz
Not Today and Not without a Fight
(Anon)

For all that has been, thanks.
For all that will be, yes.
(Dag Hammarskjold)


On Mon, Dec 16, 2013 at 7:04 AM, David Newton
wrote:

> Could one of you explain to me how the statistics are calculated?
>
> In my family file the average lifespan by century never exceeds 17 years
> whereas the average male and female lifespans are around 53 and 48
> respectively. These figures seem to be inconsistent with each other but
> in the absence of how the calculations are done I cannot be sure what it
> is telling me.
>
> David
>
>
>
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>
>
>



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Re: [LegacyUG] Lifespan, and other, statistics

[singhals]

David Newton wrote:
> Could one of you explain to me how the statistics are calculated?
>
> In my family file the average lifespan by century never exceeds 17 years
> whereas the average male and female lifespans are around 53 and 48
> respectively. These figures seem to be inconsistent with each other but
> in the absence of how the calculations are done I cannot be sure what it
> is telling me.

I assume they're simple averages: add together all the
individual lifespans and divide by the number of entries.
These stats can shed some serious light or doubt on some
"facts." (g)




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RE: [LegacyUG] Lifespan, and other, statistics

[Graham Love]

I can't figure this out. Same issue with marriages by century.
Graham

-Original Message-
From: David Newton [mailto:davidnew...@drdavid.plus.com]
Sent: 16 December 2013 12:05
To: LegacyUserGroup@LegacyUsers.com
Subject: [LegacyUG] Lifespan, and other, statistics

Could one of you explain to me how the statistics are calculated?

In my family file the average lifespan by century never exceeds 17 years 
whereas the average male and female lifespans are around 53 and 48 
respectively. These figures seem to be inconsistent with each other but in the 
absence of how the calculations are done I cannot be sure what it is telling me.

David





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